Klesha 108 108 km 2026
Also known as: Koshu Alps Klesha
A two-lap race from Enzan in Koshu City: the 70 km Haute Route first, then a second lap on the 36 km Marronnier Route. Over 80% trail and nearly all singletrack, it runs from before dawn along ridges facing Mt. Fuji and through beech and mizunara forest.
The course tops out at 1,995 m (low point 457 m). There are 3 big climbs: 1,515 m around 0–26 km; 688 m around 43–51 km; 1,064 m around 71–85 km. About 40% of the distance is gentle (under 5% grade). In 2025, 53% of starters finished — a tough one. The median finish was about 17 h, through one night.
Estimate your finish from your ITRA index
Estimate (no finisher data for this race)
Enter your ITRA performance index to get an estimated finish time, aid-station splits and cutoff margins. This race has no finisher ITRA data, so it uses the transfer model: your predictions for the 205 races that do have finisher data, scaled by distance and elevation gain (km-effort) — the same calculation as the TRAIL STATUS app. Nothing is saved or sent.
The app adds predictions from your training log (Strava), race-day pacing and more. Free, no sign-up.
Predict in detail from my Strava trainingOverview
- Date
- Sun, 8 Nov 2026
- Start
- 03:00
- Location
- Yamanashi, Japan
- Distance
- 108 km
- Elevation gain
- 6,500 m
- Time limit
- 18h
- ITRA
- 100K
- Official website
- www.lamontee.net/koshualps/race
Elevation profile
Aid stations and cutoffs
| # | Distance | Aid station | Segment | Cutoff |
|---|---|---|---|---|
| 1 | 70 km | Aid 1CP6 会場エイド（1周目終了・リスタート期限） | 70 km | Day 1 16:0013h |
| 2 | 86 km | Aid 2CP4 深沢エイド | 16 km | Day 1 18:3015h 30m |
| 3 | 98 km | Aid 3CP5 マロニエエイド | 12 km | Day 1 19:3016h 30m |
| F | 108 km | FINISH | 10 km | Day 1 21:0018h |
The small figure under each cutoff is the time from the start. Day 1 is the day of the start.
Registration
- Registration
- Sat, 6 Jun 2026 – Mon, 31 Aug 2026
- Entry
- First come, first served
Add the race in the app to put registration opening and closing and the lottery results into your calendar.
2025 results
34 starters, 18 finishers (52.9% finish rate). Finish times of those who finished:
- Fastest
- 15h 29m
- Top 10%
- 16h 13m
- Top 25%
- 16h 47m
- Median
- 17h 20m
- Top 75%
- 17h 44m
- Top 90%
- 17h 51m
- Last finisher
- 17h 55m
"Top 25%" means one in four finishers had crossed the line by this time.
Years with a different course or different cutoffs are not directly comparable.
Practice courses
See the course on the Runnable map ↗
Runnable has practice courses on this race's trails, split into sections to run and sections to walk (pages in Japanese).
- Runnable practice course (98.3 km)
Other races
- Mt.FUJI 100 KAI70k 2026Sat, 25 Apr 2026 · Yamanashi, Japan · 68.6 km
- Mt.FUJI 100 KAI70k 2027Sat, 24 Apr 2027 · Yamanashi, Japan · 67.9 km
- Mt.FUJI 100 ASUMI40k 2026Sat, 25 Apr 2026 · Yamanashi, Japan · 38.5 km
- Mt.FUJI 100 ASUMI40k 2027Sat, 24 Apr 2027 · Yamanashi, Japan · 38.5 km
- Mt. Fuji Mountain Race 15 km 2026Fri, 24 Jul 2026 · Yamanashi, Japan · 15 km
- Takeda no Mori 30 km 2026Sun, 13 Dec 2026 · Yamanashi, Japan · 30 km
From your training log, TRAIL STATUS estimates your finish time, aid-station splits and cutoff margins for this race.
Predict my raceCompiled from each race's official information. Details can change, so always check the race's official website for the latest. Spotted a mistake? Please tell us through the contact form.
TRAIL STATUS · FAQ · Privacy policy